docs: def _example_from_array_spec(self, prop_spec):
          """Get an example from a property specification of an array.
  
          Args:
              prop_spec: property specification you want an example of.
  
          Returns:
              An example array.
          """
          # if items is a list, then each item has its own spec
          if isinstance(prop_spec['items'], list):
              return [self.get_example_from_prop_spec(item_prop_spec) for item_prop_spec in prop_spec['items']]
          # Standard types in array
          elif 'type' in prop_spec['items'].keys():
              if 'format' in prop_spec['items'].keys() and prop_spec['items']['format'] == 'date-time':
                  return self._get_example_from_basic_type('datetime')
              else:
                  return self._get_example_from_basic_type(prop_spec['items']['type'])
  
          # Array with definition
          elif ('$ref' in prop_spec['items'].keys() or
                ('schema' in prop_spec and'$ref' in prop_spec['schema']['items'].keys())):
              # Get value from definition
              definition_name = self.get_definition_name_from_ref(prop_spec['items']['$ref']) or \
                  self.get_definition_name_from_ref(prop_spec['schema']['items']['$ref'])
              if self.build_one_definition_example(definition_name):
                  example_dict = self.definitions_example[definition_name]
                  if not isinstance(example_dict, dict):
                      return [example_dict]
                  if len(example_dict) == 1:
                      try:  # Python 2.7
                          res = example_dict[example_dict.keys()[0]]
                      except TypeError:  # Python 3
                          res = example_dict[list(example_dict)[0]]
                      return res
  
                  else:
                      return_value = {}
                      for example_name, example_value in example_dict.items():
                          return_value[example_name] = example_value
                      return [return_value]
          elif 'properties' in prop_spec['items']:
              prop_example = {}
              for prop_name, prop_spec in prop_spec['items']['properties'].items():
                  example = self.get_example_from_prop_spec(prop_spec)
                  if example is not None:
                      prop_example[prop_name] = example
              return [prop_example]